IT997184B - PHOTOMETER - Google Patents

PHOTOMETER

Info

Publication number
IT997184B
IT997184B IT4882/73A IT488273A IT997184B IT 997184 B IT997184 B IT 997184B IT 4882/73 A IT4882/73 A IT 4882/73A IT 488273 A IT488273 A IT 488273A IT 997184 B IT997184 B IT 997184B
Authority
IT
Italy
Prior art keywords
photometer
Prior art date
Application number
IT4882/73A
Other languages
Italian (it)
Inventor
S Barbieri
Original Assignee
Durst Ag
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Durst Ag filed Critical Durst Ag
Priority to IT4882/73A priority Critical patent/IT997184B/en
Priority to DE2416451A priority patent/DE2416451A1/en
Priority to US05/515,908 priority patent/US3984676A/en
Priority to FR7435596A priority patent/FR2249318B1/fr
Priority to GB4632974A priority patent/GB1477718A/en
Priority to JP49122641A priority patent/JPS50106684A/ja
Application granted granted Critical
Publication of IT997184B publication Critical patent/IT997184B/en

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J1/00—Photometry, e.g. photographic exposure meter
    • G01J1/42—Photometry, e.g. photographic exposure meter using electric radiation detectors
    • G01J1/44—Electric circuits
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B17/00—Details of cameras or camera bodies; Accessories therefor
    • G03B17/18—Signals indicating condition of a camera member or suitability of light
    • G03B17/20—Signals indicating condition of a camera member or suitability of light visible in viewfinder

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Photometry And Measurement Of Optical Pulse Characteristics (AREA)
  • Circuit Arrangement For Electric Light Sources In General (AREA)
IT4882/73A 1973-10-26 1973-10-26 PHOTOMETER IT997184B (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
IT4882/73A IT997184B (en) 1973-10-26 1973-10-26 PHOTOMETER
DE2416451A DE2416451A1 (en) 1973-10-26 1974-04-04 LIGHT METER
US05/515,908 US3984676A (en) 1973-10-26 1974-10-18 Light-measuring apparatus with lamp indicator for determining balance of a measuring bridge
FR7435596A FR2249318B1 (en) 1973-10-26 1974-10-23
GB4632974A GB1477718A (en) 1973-10-26 1974-10-25 Apparatus for providing a measure of the intensity of light
JP49122641A JPS50106684A (en) 1973-10-26 1974-10-25

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT4882/73A IT997184B (en) 1973-10-26 1973-10-26 PHOTOMETER

Publications (1)

Publication Number Publication Date
IT997184B true IT997184B (en) 1975-12-30

Family

ID=11115528

Family Applications (1)

Application Number Title Priority Date Filing Date
IT4882/73A IT997184B (en) 1973-10-26 1973-10-26 PHOTOMETER

Country Status (6)

Country Link
US (1) US3984676A (en)
JP (1) JPS50106684A (en)
DE (1) DE2416451A1 (en)
FR (1) FR2249318B1 (en)
GB (1) GB1477718A (en)
IT (1) IT997184B (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3994597A (en) * 1974-12-26 1976-11-30 Calder William E Optical sight with variable illumination
DE2659658A1 (en) * 1976-12-30 1978-07-06 Riba Jutta CONTROL DEVICE FOR MONITORING LIGHT BULBS
DE4114592A1 (en) * 1991-05-03 1992-11-05 Licentia Gmbh Photodetector arrangement with current=carrying detector element in bridge - uses frequency modulation of bridge operating voltage and corresp. frequency selective evaluation of diagonal voltage
DE4114489A1 (en) * 1991-05-03 1992-11-05 Licentia Gmbh Photodetector arrangement with current carrying element - uses frequency selective evaluation of detector voltage with modulation of detector current

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3530378A (en) * 1967-08-24 1970-09-22 Leitz Ernst Gmbh Lamp indicator for the balance of a wheatstone bridge
JPS5148301Y2 (en) * 1971-09-02 1976-11-20

Also Published As

Publication number Publication date
USB515908I5 (en) 1976-01-20
FR2249318B1 (en) 1978-08-11
US3984676A (en) 1976-10-05
FR2249318A1 (en) 1975-05-23
GB1477718A (en) 1977-06-22
DE2416451A1 (en) 1975-04-30
JPS50106684A (en) 1975-08-22

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